Setup -SSH KEYS on Linux Centos7 server with linux and windows clinet

Setup -SSH KEYS on Linux Centos7 server with linux and windows clinet
using ssh-keygen and puttyGen on windows
disable password authentication
put rule on iptables to detect limted ip to make ssh and drop others
manage /hosts.allow and hosts.deny
Server : Centos7
Client : Centos7 & Windows10

source

centos 7